Metsulfuron-methyl is a systemic sulfonylurea herbicide and has been widely used to control broad-leaved weeds and annual grasses in rice, maize, wheat, and barley. Metsulfuron-methyl has highly efficient herbicidal activity and low mammalian toxicity[1].
[1]. Guangyang Liu, et al. Visual and Colorimetric Sensing of Metsulfuron-Methyl by Exploiting Hydrogen Bond-Induced Anti-Aggregation of Gold Nanoparticles in the Presence of Melamine. Sensors (Basel). 2018 May 17;18(5):1595.